Using High Availability Monitors (June 2003)

Monitoring Disk Resources
HA Disk Monitor Reference
Chapter 230
Table 2-1 lists how conditions compare in logical operations. Specify the
logical operation in the monitor request parameters portion of the
monitor request. For example, to create a request that alerts you when
the condition is SUSPECT or DOWN, specify greater than or equal to 3 (>=3).
The pv_summary resource may not be available for a given volume group
in the following cases:
• Devices are on an unsupported bus (such as HP-IB or HP-FL) or an
unrecognized bus, (such as a new bus technology). The
/var/adm/syslog/syslog.log entry would say:
diskmond[5699]: pv_summary will be unavailable for
/dev/vg00 because there are physical volumes in this volume
group which are on an unrecognized bus. (DRM-502).
Table 2-1 Interpreting Physical Volume Summary
Resource Name: /vg/ vgName /pv_summary
Condition Value Interpretation
UP 1 All physical volumes containing data are accessible.
PVG_UP 2 At least 1 PV has failed. All data is accessible. If
more than 1 PV is down and the failed PVs are from
the same PVG, all data is still accessible.
This condition can only occur in mirrored set or in
PV links in PVGs.
SUSPECT 3 Two or more physical volumes from different PVGs
are not available. The disk monitor cannot conclude
that all data is available.
For example, on a 2-way mirrored system, if a
physical volume fails on each side of the mirror, data
may be available if the failed volumes are holding
different data. But data may be unavailable if the
failed volumes hold the same data. Because the disk
monitor only knows that disks have failed, and not
what data is on the disks, it marks the volume group
SUSPECT.
DOWN 4 Some data missing or no data accessible.